Rolf Wallin
type: MusicGroup
genre: avant-garde
description: Rolf Wallin (born 7 September 1957) is a Norwegian composer, trumpeter and avant-garde performance artist. Biography Wallin was born in Oslo, where he studied with Finn Mortensen and Olav Anton Tho
popularity: 2
followers: 301
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6ef398cce5093bea5b0430b55dee03aa069990360f2d5138880d6b8f902b8569
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953985
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953985
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2dfca77f-1d51-4489-aaac-dbf6007ef8c4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2dfca77f-1d51-4489-aaac-dbf6007ef8c4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2dfca77f-1d51-4489-aaac-dbf6007ef8c4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:03:53Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6ef398cce5093bea5b0430b55dee03aa069990360f2d5138880d6b8f902b8569","name":"Rolf Wallin","registered_at":"2026-06-16T05:39:19Z","symbol":"NIM0954417","token_address":"0xe3cb4402e615d7ac9666ebe5f4d04d789a7522cc","type":"artist","uuid":"2dfca77f-1d51-4489-aaac-dbf6007ef8c4"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef398cce5093bea5b0430b55dee03aa069990360f2d5138880d6b8f902b8569. Chain 2 (Bitcoin): anchored in block 953985 (2026-06-16T18:03:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dfca77f-1d51-4489-aaac-dbf6007ef8c4.json and https://artists.proofprofile.net/proofs/artist/2dfca77f-1d51-4489-aaac-dbf6007ef8c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:03:53Z
  text: {"copyright_id":"0x6ef398cce5093bea5b0430b55dee03aa069990360f2d5138880d6b8f902b8569","name":"Rolf Wallin","registered_at":"2026-06-16T05:39:19Z","symbol":"NIM0954417","token_address":"0xe3cb4402e615d7ac9666ebe5f4d04d789a7522cc","type":"artist","uuid":"2dfca77f-1d51-4489-aaac-dbf6007ef8c4"}
album: Rolf Wallin: Five Seasons, Stride & Other Orchestral Works
  type: MusicAlbum
  date published: 2024-03-01